Revisiting symbiotic binaries with interferometry

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10511266" target="_blank" >RIV/00216208:11320/25:10511266 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=vVNll28QrH" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=vVNll28QrH</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/202556135" target="_blank" >10.1051/0004-6361/202556135</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Revisiting symbiotic binaries with interferometry

Popis výsledku v původním jazyce

Symbiotic stars, which generally comprise a red giant and an accreting white dwarf, are excellent laboratories to understand mass transfer in long-period binaries. One of the fundamental questions is how mass is transferred from the red giant to the white dwarf. We used interferometric measurements made with the VLTI/PIONIER instrument, combined with Gaia data, to measure the radius of the giant in seven symbiotic systems. We further placed the giants in the Hertzsprung-Russell diagram, allowing us to estimate their mass and to show that they are all very evolved and likely on the asymptotic giant branch. We compared our measured giant radii to their Roche lobe radius, showing that, except for ZZ CMi, all giants are well within their Roche lobe and that mass transfer likely takes place via stellar wind. Our interferometric data provide further evidence that the giant in ZZ CMi (nearly) fills its Roche lobe. Our conclusions are still hampered by the poor characterisation of some of the giants or their binary orbits, and we encourage the community to make an effort to provide these.

Název v anglickém jazyce

Revisiting symbiotic binaries with interferometry

Popis výsledku anglicky

Symbiotic stars, which generally comprise a red giant and an accreting white dwarf, are excellent laboratories to understand mass transfer in long-period binaries. One of the fundamental questions is how mass is transferred from the red giant to the white dwarf. We used interferometric measurements made with the VLTI/PIONIER instrument, combined with Gaia data, to measure the radius of the giant in seven symbiotic systems. We further placed the giants in the Hertzsprung-Russell diagram, allowing us to estimate their mass and to show that they are all very evolved and likely on the asymptotic giant branch. We compared our measured giant radii to their Roche lobe radius, showing that, except for ZZ CMi, all giants are well within their Roche lobe and that mass transfer likely takes place via stellar wind. Our interferometric data provide further evidence that the giant in ZZ CMi (nearly) fills its Roche lobe. Our conclusions are still hampered by the poor characterisation of some of the giants or their binary orbits, and we encourage the community to make an effort to provide these.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/GN24-10608O" target="_blank" >GN24-10608O: Výzkum populací symbiotických systémů a příbuzných dvojhvězd s červenými obry</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Astronomy &amp; Astrophysics

ISSN

0004-6361

e-ISSN

1432-0746

Svazek periodika

702

Číslo periodika v rámci svazku

rijen

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

12

Strana od-do

A151

Kód UT WoS článku

001596517000003

EID výsledku v databázi Scopus

2-s2.0-105020011376